Postman costs $14/mo.
These cost $0.
4 free alternatives to Postman, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
Postman vs Free Alternatives Matrix
Quick side-by-side comparison · $0/mo vs $14/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Hoppscotch | open source | cm0zfi6as00pd94snuk3byy9o | Self-host | ★ 80.7k | Postman vs Hoppscotch → |
| Insomnia | open source | cm0zfrz5200pu94snwyqzpqx7 | Self-host | ★ 40.1k | Postman vs Insomnia → |
| Karate | open source | cm0zfi6as00pd94snuk3byy9o | Self-host | ★ 9.0k | Postman vs Karate → |
| Milkman | open source | cm0zfi6as00pd94snuk3byy9o | Self-host | ★ 1.3k | Postman vs Milkman → |
The picks
4 open source · ranked by fit
- 01
Hoppscotch
open sourcecm0zfi6as00pd94snuk3byy9oSelf-host80.7koct 2026An open-source alternative for API development.
The catch vs PostmanRequires self-hosting setup, updates, and server maintenance compared to managed Postman.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/hoppscotch/hoppscotch or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-04
- 02
Insomnia
open sourcecm0zfrz5200pu94snwyqzpqx7Self-host40.1knov 2026Intuitive, multi-protocol API client for developers.
The catch vs PostmanRequires self-hosting setup, updates, and server maintenance compared to managed Postman.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/Kong/insomnia or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-04
- 03
Karate
open sourcecm0zfi6as00pd94snuk3byy9oSelf-host9.0knov 2026Combines API, UI, performance testing.
The catch vs PostmanRequires self-hosting setup, updates, and server maintenance compared to managed Postman.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/karatelabs/karate or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-04
- 04
Milkman
open sourcecm0zfi6as00pd94snuk3byy9oSelf-host1.3koct 2026Craft and organize requests for any technology.
The catch vs PostmanRequires self-hosting setup, updates, and server maintenance compared to managed Postman.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/warmuuh/milkman or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-04
Frequently Asked Questions
Direct answers · Postman open-source replacements
What is the best free alternative to Postman?+
The top free alternative to Postman is Hoppscotch (open source, cm0zfi6as00pd94snuk3byy9o). An open-source alternative for API development. Other popular Postman replacements include Insomnia, Karate, Milkman.
Can I self-host a free replacement for Postman?+
Yes. Of the 4 free alternatives to Postman, 4 can be self-hosted on your own server or local machine: Hoppscotch (cm0zfi6as00pd94snuk3byy9o), Insomnia (cm0zfrz5200pu94snwyqzpqx7), Karate (cm0zfi6as00pd94snuk3byy9o), Milkman (cm0zfi6as00pd94snuk3byy9o).
How much does switching from Postman to a free alternative save?+
Postman starts at $14/month per seat ($168/year). Switching a 5-person team to a free alternative like Hoppscotch saves $840 per year in software subscription fees.
Should I vibe-code or build my own Postman clone from scratch?+
Our build verdict for Postman is YES (the core loop fits in a weekend). Instead of paying recurring SaaS fees for Postman or rebuilding it from scratch, deploy one of the 4 battle-tested open-source alternatives like Hoppscotch or Insomnia.
What is the catch when switching from Postman to Hoppscotch?+
Requires self-hosting setup, updates, and server maintenance compared to managed Postman.
